Expansion joint member



N, P. HARSHBERGER June 6, 19 33.

nxmmsxon JOINT MEMBER Filed April 14, 1930 Patented June 6, 1933 UNITED STATES PATENT OFFICE- 'NORMAN' P. vHARSHIBIIJRGIFSR, OF PASADENA, CALIFORNIA, ASSIGIFOB '10 BAKELITE BUILDING PRODUCTS CO. INC 01 NEW YORK, N. Y., A CORIORATION OI DELAWARE EXPANSION 'Jom'r MEMBER Application filed April 14,

This invention relates to improvements in expansion joint members and method of formingthe same.

In the paving of roads, it is common practies to lay the paving material so that it is spaced apart, at frequent intervals, along transverse lines, topermit expansion and contraction of said material when temperature changes occur. It has also been the practice to insert in the transverse spaces flexible expansion joint-members, the latter 0f the bituminous material rom all edges thereof. This gradual loss of the bituminous Inaterial'naturally decreases the efiectiveness of the joint. V It is, therefore, one of the objects of'this invention to provide an improved expansion 'oint member in which the possibility of the ituminous material oozing from the upper and lower edges is eliminated. 7

A" more specific object of this invention is to provide an expansion joint member which consists of a single continuous len h of saturated fabric which has been woun into oval or cylindrical form and then flattened to form a product composed of a pluralit'y'of layers, which is, nevertheless, closed at both i p the top and bottom. r

With the above and other objects in view,

the invention consists of the improved-expansion joint member and method of form ing the same, and all its parts and combinations, as set forth in the claims, and all equivalents thereof.

4 In the accompanying drawing, in which the same reference numerals designate the same parts in all of the views:

Fig. l is a perspective view showing the expansion jomt material wound on a roller;

1930. Serial No. 444,832.

a Fig. 2 is a similar view showing the roller removed;

Fig. 3 is a perspective view showing the com letcd fiat expansion joint member;

F1gs. 4, 5 and 6 are views similar to Figs.

1, 2 and 3 showing the manner of forming the expansion joint member with an oval form;

Fig.7 is a modified form of expansion joint member; and

Fi 8 is a sectional view of the material used in the expansion joint;

Referring to the drawing, the numeral 10 designates the fabric base, preferabl felt, of the expansion joint material, and t e numeral 11 the bituminous coating which is preferably asphalt. In manufacturing the expansion joint, a continuous strip 12 of the above described material is wound in cylindrical form upon a roller'13 as shown in form upon an oval-shaped Fig. 1, or in ova member 14 as shown in Fig.4. Next, the

form over which the strip has been wound is withdrawn, as illustrated in Figs; 2 and 5, a

and the material is then flattened or com- .pressed to the shape shown in Figs. 3 and v6.

To produce the modified form of expan-' sion joint member shown in-Fig. 7, the same procedure as above described is carried out,

except that in compressing-the roll more pressure is directed upon one edge than upon the opposite edge to produce the wedgeshaped finished product shown.

The finished sections shown in Figs. 3, 6

and 7 may be made of any desired length and in use they are inserted in the transverse spaces between pavement sections, with the closed portions forming upper and lower edges. Due to the flexibility of the members, they will permit the pavement sections to expand in warm weather without danger of the road surface buckling. Due to the fact I that the expansion-joint members are formed of a continuous strip wound in a roll and flat.-

tened to form two closed edges, there will be no oozing of the bituminous coating from the upper and lower-edges'of the members.

- From the foregoing description, it may readily be seen. that an expansion joint member has been roduced which is simple in construction, e ective in use, and well adapted for the purpose described.

What I claim is: 5 1. An expansion joint member for use in paving comprising a strip of fabric having a coating of material which has the characteristic of oozing under the influence of heat and pressure, said joint member being the tubular wound and flattened formation of said strip, the coating being on the inner side of the fabric and the closed edges of the member preventing loss of coating material from said edges.

2. An expansion joint member for use in paving, comprising a fibrous web prepared with a coating of material which has the characteristic of oozing under the influence of heat and pressure, said joint member being the wound and shaped formation of said web, and having its outermost transverse ends forming sealed edges to retain the coating material Within the structure of said member.

3. An expansion joint member for use in paving, comprising a composite shaped formation of concentric layers of flexible material prepared with an adhesive coating-hav- 30 ing the property of oozing under the in fluence of heat and pressure, said adhesive coating being confined within said structure by the sealed edge of the end of the outermost layer of the member.

35 In testimony whereof I aflix my signature.

. NORMAN P. HARSHBERGER. 

